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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (F856) ACCELERATOR PEDAL POSITION SENSOR NO. 2 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH (K29) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE (K400) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SENSOR GROUND CIRCUIT OPEN OR HIGH (F856) ACCELERATOR PEDAL POSITION SENSOR NO. 2 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND (K29) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO GROUND (K29) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO THE (K400) (K29) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO THE (K167) ACCELERATOR PEDAL POSITION SENSOR ENGINE CONTROL MODULE (ECM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC IS ACTIVE NOTE: If a Sensor reference or supply voltage DTC is also present, perform the applicable diagnostic pro- NOTE: The APP Sensor is a device that contains two separate potentiometer type sensors. Each sensor has NOTE: The APP Sensor 2 signal should always be approximately 1/2 the voltage of the APP Sensor 1 signal. With the scan tool, Clear DTCs in the Engine Control Module (ECM). Fully depress and release the Accelerator Pedal several times. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1688 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |